JP5558520B2 - State determination device, state determination system, state determination method, and program - Google Patents

Description

  The present invention relates to a state determination device, a state determination system, a state determination method, and a program.

  In recent years, with the progress of an aging society and nuclear family, the number of elderly people living alone (single elderly people) has been increasing. Therefore, there is an increasing demand for a “watching service” for monitoring the safety of such elderly people living alone, and various monitoring techniques applicable to this service are disclosed.

  For example, by recording power consumption in the database for each time zone and day, calculating the basic pattern of power consumption recorded in the database, and comparing the calculated basic pattern with the pattern of power consumption for the day A technique for detecting a life change of a resident is disclosed (for example, see Patent Document 1).

  In addition, there is a technology that obtains a cluster corresponding to each time by performing a cluster analysis on the response pattern of each sensor installed in a house, and detects a resident's abnormality by comparing it with a standard cluster in a standard state (daily state). It is disclosed (for example, see Patent Document 2).

JP 2011-81673 A JP 2004-295861 A

  However, in the techniques disclosed in Patent Documents 1 and 2, the basic pattern and the standard cluster are averages of the resident behavior patterns. For this reason, if the same electric device is not used every day, there is a possibility that the resident is determined to be abnormal although no abnormality has occurred. However, resident behavior patterns are inherently diverse and it is not appropriate to force residents to use electrical equipment in the same way every day.

  In addition, when an automatic operation device such as an electric water heater that automatically operates using a timer or the like is installed in the house, the amount of change in power consumption by the automatic operation device is included in the basic pattern and standard cluster. For this reason, even if an abnormality occurs in the resident, there is a possibility that the change in power consumption by the automatic operation device is determined as a daily operation of the electric device by the resident, and the resident's abnormality may be overlooked. is there.

  This invention is made | formed in view of the said situation, and it aims at providing the state determination apparatus, state determination system, state determination method, and program which can determine a resident's state more correctly.

In order to achieve the above object, a state determination device according to the present invention provides:
A measurement unit that measures the power consumption of the in- house equipment at predetermined time intervals;
A recording unit that records information on power consumption measured by the measurement unit together with a time when the information was acquired;
Based on the information recorded in the recording unit, a short-term fluctuation value is calculated as a variance of power consumption in each time period obtained by dividing a predetermined period by a predetermined window width, and the time in each time period during the predetermined period A calculation unit that calculates a long-term fluctuation value as a variance of the average power consumption by band ,
Based on the short-term variation value and the long-term variation value calculated by the calculation unit, a time zone determination unit that determines a time zone for determining the state of a resident in the house,
A determination unit that determines the state of the resident based on the power consumption of the household equipment in the time period determined by the time period determination unit;
Is provided.

  According to the present invention, both the short-term fluctuation value in each time zone of the information related to the operating state of the home equipment and the long-term fluctuation value in the same time zone over a plurality of days are calculated. The short-term fluctuation value is a value indicating whether or not the home equipment is operating in the time zone, and the long-term fluctuation value is whether or not the operation state of the home equipment is steady in the time zone. This is the value shown. For this reason, if short-term fluctuation values and long-term fluctuation values are used, whether fluctuations in the information related to the operating state of in-home equipment during that time period are due to automatic operation equipment that operates with a timer, etc. It can be distinguished whether it is a thing. As a result, the resident's state can be determined more accurately.

It is a schematic diagram which shows the structure of the safety confirmation system which concerns on Embodiment 1 of this invention. It is a block diagram which shows the hardware constitutions of the safety confirmation apparatus which concerns on Embodiment 1 of this invention. It is a block diagram which shows the function structure of the safety confirmation apparatus which concerns on Embodiment 1 of this invention. It is a flowchart which shows the operation | movement procedure of the time zone determination part which concerns on Embodiment 1 of this invention. It is a graph which shows an example of transition of the daily power consumption in a house. It is a graph which shows an example of transition of the average value (predetermined period) according to time of power consumption in a house. It is a table which shows the relationship between the magnitude of a short-term fluctuation value, a long-term fluctuation value, and the cause of fluctuation | variation of power consumption. It is a graph which shows an example of transition of the short-term fluctuation value of a day in a house, and a long-term fluctuation value. It is a flowchart which shows the operation | movement procedure of the safety confirmation part which concerns on Embodiment 2 of this invention.

  Embodiments of the present invention will be described in detail with reference to the drawings.

Embodiment 1 FIG.
First, a first embodiment of the present invention will be described.

  A configuration of the safety confirmation system 1 according to the first embodiment will be described. In this embodiment, the safety confirmation system 1 corresponds to a state determination system.

  FIG. 1 shows a schematic configuration of a safety confirmation system 1 according to the first embodiment. As shown in FIG. 1, the safety confirmation system 1 is a system for confirming the safety of a resident 80 of a house 70. In other words, the safety confirmation system 1 is a system that determines the state of the resident 80. The resident 80 is an elderly person living alone, for example.

  As an abnormal state that may occur in the resident 80, for example, a state in which the resident 80 has become unconscious due to the onset or fall of chronic illness, or a state in which the resident 80 has died may be considered. The safety confirmation system 1 determines that the resident 80 has fallen into an abnormal state if the resident 80 does not operate the electrical device 30 in the house 70 for a long time. In this embodiment, the safety confirmation system 1 determines the state of the occupant 80 based on information related to in-home power consumption.

  The house 70 is provided with an indoor wiring 26. The indoor wiring 26 supplies electric power supplied from an outdoor substation or the like to the electrical device 30 that is a facility in the house 70.

  The electric device 30 is connected to the indoor wiring 26. The electric device 30 operates with electric power supplied through the indoor wiring 26. Although only one electrical device 30 is shown in FIG. 1, a plurality of electrical devices 30 are actually installed in the house 70. Examples of the electric device 30 include devices operated by a person such as a vacuum cleaner, a microwave oven, an IH (Induced Heating) cooker, an air conditioner, a rice cooker, a washing machine, a dishwasher, and a television. The electric device 30 also includes automatic operation devices such as electric water heaters, scheduled charging and timer setting devices for electric vehicles.

  The safety confirmation system 1 includes a safety confirmation device 10 and a power sensor 20. In this embodiment, the safety confirmation device 10 corresponds to a state determination device. The safety confirmation device 10 and the power sensor 20 are installed in the house 70.

  The safety confirmation system 1 further includes a server 50. The server 50 is placed in a monitoring center 60 outside the house 70. The server 50 is connected to the safety confirmation device 10 via the communication network 40. In this embodiment, the server 50 corresponds to a notification device. Note that the safety confirmation device 10 may be installed outside the house 70.

  The power sensor 20 is provided in the middle of the indoor wiring 26. The power sensor 20 measures the power consumption that is supplied to and consumed by all the electrical devices 30 via the indoor wiring 26. The power sensor 20 includes, for example, a clamp type current sensor and a voltage sensor. The power sensor 20 outputs the measured power consumption value to the safety confirmation device 10.

  The safety confirmation device 10 accumulates the measured power consumption value output from the power sensor 20. The safety confirmation device 10 confirms the safety of the resident 80, that is, determines the state (normal state / abnormal state) of the resident 80, based on the accumulated measurement value of power consumption. The safety confirmation device 10 transmits a signal indicating the determined status of the resident 80, that is, a signal indicating the safety information (normal / abnormal) of the resident 80 to the server 50 of the monitoring center 60 via the communication network 40.

  The communication network 40 is constructed by, for example, the Internet, an intranet, or a public line network. The communication network 40 may include a wired or wireless LAN (Local Area Network), a WAN (Wide Area Network), or the like.

  The server 50 installed in the monitoring center 60 is connected to the safety confirmation device 10 via the communication network 40. The server 50 receives a signal indicating the safety information of the resident 80 from the safety confirmation device 10.

  The server 50 is provided with a monitor. The server 50 displays the safety information of the resident 80 on the monitor based on the received signal indicating the safety information of the resident 80.

  Actually, there are a plurality of houses 70. The server 50 is connected to the plurality of safety confirmation devices 10 installed in each of the plurality of houses 70 via the communication network 40. The server 50 accumulates the safety information of the residents 80 of all the houses 70 that use the safety confirmation service, and displays the safety information on the monitor.

  FIG. 2 shows a hardware configuration of the safety confirmation device 10. As shown in FIG. 2, the safety confirmation device 10 includes a CPU (Central Processing Unit) 11, a ROM (Read Only Memory) 12, a RAM (Random Access Memory) 13, a hard disk 14, a signal interface 15, a clock circuit unit 16, a display. Unit 17, operation unit 18, and network interface 19.

  The CPU 11 executes software processing according to a control program stored in the ROM 12 or the hard disk 14. By executing this software process, the CPU 11 controls the safety confirmation device 10 as a whole.

  The ROM 12 stores a control program of the safety confirmation device 10 and fixed data such as a threshold value used in the control program.

  The RAM 13 temporarily stores various data such as intermediate data and final data obtained by the processing of the CPU 11 during execution of the control program by the CPU 11.

  The hard disk 14 stores various data in association with each other, for example, in a table format. The safety confirmation device 10 may include a flash memory instead of the hard disk 14.

  The signal interface (I / F) 15 is connected to the power sensor 20 via a serial line. The signal I / F 15 receives a power value measured from the power sensor 20 via a serial line.

  The clock circuit unit 16 measures time. The time measured by the clock circuit unit 16 can be read by the CPU 11. The CPU 11 uses the time read from the clock circuit unit 16 for software processing.

  The display unit 17 displays various codes such as an error code in accordance with the signal output from the CPU 11.

  The operation unit 18 inputs a signal corresponding to the operation input of the resident 80.

  A network interface (I / F) 19 is an interface of the communication network 40. The CPU 11 transmits a signal indicating safety information of the resident 80 to the server 50 via the network I / F 19 and the communication network 40.

  FIG. 3 shows a functional configuration of the safety confirmation device 10 according to the embodiment of the present invention. As shown in FIG. 3, the safety confirmation device 10 includes a measurement unit 100, a recording unit 200, a calculation unit 300, a time zone determination unit 400, a safety confirmation unit 500, and a transmission unit 600. In the safety confirmation device 10, the processing proceeds in the order of the measurement unit 100, the recording unit 200, the calculation unit 300, the time zone determination unit 400, the safety confirmation unit 500, and the transmission unit 600.

  When the safety confirmation device 10 is activated, first, the measurement unit 100 starts processing. The measurement unit 100 is constructed by the CPU 11, the ROM 12, the RAM 13, and the signal I / F 15 shown in FIG. The measurement unit 100 measures the power consumption value of the electrical device 30 at a predetermined time interval Δt (for example, 1 minute). More specifically, the measurement unit 100 inputs the sensor output of the power sensor 20 at a predetermined time interval Δt (for example, 1 minute). In practice, the CPU 11 acquires the sensor output of the power sensor 20 as a measured value of power consumption via the signal I / F 15. The CPU 11 outputs the acquired measured value of power consumption to the recording unit 200 by serial communication. The measurement unit 100 may include the power sensor 20. Further, the power sensor 20 itself may be used as the measurement unit 100 instead of as a component of the safety confirmation device 10.

  Along with the measurement unit 100, the recording unit 200 starts processing. The recording unit 200 is constructed by the CPU 11, ROM 12, RAM 13, hard disk 14, and clock circuit unit 16 shown in FIG. The recording unit 200 records the measured value of power consumption measured by the measuring unit 100 together with the time when the information is acquired. The time is the time read from the clock circuit unit 16. The power consumption measurement value associated with the time is stored in the hard disk 14 only for a predetermined period (for example, one month), for example.

  While the measurement unit 100 and the recording unit 200 perform processing at a predetermined time interval Δt, the calculation unit 300 performs processing when a certain amount of data is accumulated in the recording unit 200, for example, when one month has elapsed. Start. The calculation unit 200 is constructed by the CPU 11, the ROM 12, the RAM 13, and the hard disk 14 shown in FIG. Based on the information recorded in the recording unit 200, the calculation unit 300 calculates a short-term fluctuation value of power consumption in each of a plurality of time zones and a long-term fluctuation value of power consumption over a plurality of days in the same time zone. To do. More specifically, the calculation unit 300 calculates, for example, the variance of the measured power consumption value in each time zone as a short-term fluctuation value, and the long-term variance of the measured power consumption value in each time zone over a plurality of days. Calculated as a fluctuation value.

  Along with the calculation unit 300, the time zone determination unit 400 starts processing. The time zone determination unit 400 is constructed by the CPU 11, the ROM 12, the RAM 13, and the hard disk 14 shown in FIG. The time zone determination unit 400 determines a time zone for determining the state of the resident 80 in the home based on the short-term variation value and the long-term variation value calculated by the calculation unit 300. The set time zone is output to the safety confirmation unit 500.

  Together with the time zone determination unit 400, the safety confirmation unit 500 starts processing. The safety confirmation unit 500 is constructed by the CPU 11, ROM 12, RAM 13, hard disk 14, signal I / F 15 and clock circuit unit 16 shown in FIG. Safety confirmation unit 500 determines the state of occupant 80 based on the value of power consumption in the time zone on the day of safety confirmation determined by time zone determination unit 400. More specifically, the safety confirmation unit 500 detects that the time zone of the safety confirmation day is reached, based on the time measured by the clock circuit unit 16. And the safety confirmation part 500 inputs the sensor output of the electric power sensor 20 via signal I / F15, and obtains the value of the power consumption in the time slot | zone. Furthermore, the safety confirmation unit 500 determines the state of the resident 80 based on the obtained measured value of power consumption. More specifically, the safety confirmation unit 500 calculates, for example, the variance of the measured power consumption values in the time zone for confirming the safety of the resident 80. Then, the safety confirmation unit 500 determines whether the calculated variance exceeds a predetermined threshold.

  Along with the calculation unit 300, the time zone determination unit 400, and the safety confirmation unit 500, the transmission unit 600 starts processing. The transmission unit 600 is constructed by the CPU 11 and the network I / F 19. The transmission unit 600 transmits the safety information of the resident 80 based on the determination by the safety confirmation unit 500 to the server 50 of the monitoring center 60 via the communication network 40 from the network I / F 19.

  The server 50 of the monitoring center 60 executes a predetermined process when an abnormality occurs in the resident 80 based on the received safety information of the resident 80. For example, the server 50 can display on the display that an abnormality has occurred in the resident 80. In addition, the server 50 can send an e-mail to a family of resident 80 and care service staff registered in advance. By such processing, a family member or a care service staff who knows that an abnormality has occurred in the resident 80 can immediately take appropriate measures such as visiting the house 70.

  Next, the operation of the safety confirmation system 1 according to the first embodiment will be described.

FIG. 4 shows an example of the operation of the time zone determination unit 400. First, the time zone determination unit 400 acquires the power consumption X for a predetermined period (for example, one month) accumulated in the recording unit 200 (step S301). In the following, the power consumption at time j on day i is represented by X _{i, j} . Further, N is the total number of power consumption X _{i, j} acquired in a predetermined period. FIG. 5 shows an example of the transition of the daily power consumption X _{i, j} in the house 70.

Subsequently, the time zone determination unit 400 calculates the amount of power consumption fluctuation (short-term fluctuation value Sm _k ) in each time zone k (step S302). More specifically, the time zone determination unit 400 divides all power consumption X _{i, j} in a predetermined period (for example, one month) by a predetermined window width M (for example, one hour), to calculate the short-term fluctuation value Sm _k of band k. M is the total number of power consumption X _i, in that time zone k.

すなわち、短期変動値Ｓｍ_kは、その時間帯ｋにおける消費電力Ｘ_i,jの分散である。 The short-term fluctuation value Sm _k in the k-th time zone is _represented by the following equation.

That is, the short-term fluctuation value Sm _k is a variance of the power consumption X _{i, j} in the time zone k.

Subsequently, the time zone determination unit 400 calculates an average value Md _{i, k} for each time zone of the power consumption X _{i, j over} a predetermined period in the time zone k divided by the predetermined window width M (step S303). ). The average value Md _{i, k} for each time zone in the k-th time zone on the i-th day is as follows. FIG. 6 shows an example of the transition of the average value Md _{i, k} of the power consumption in the house 70 for each time zone.

Subsequently, the time zone determination unit 400 calculates the long-term fluctuation value Sh _k of the time zone average value Md _{i, k} during a predetermined period (step S304). First, the time zone determination unit 400 obtains the average value of the time zone average values Md _{i, k} in the time zone k in the predetermined period N using the following equation.

続いて、時間帯決定部４００は、次式を用いて、ｋ番目の時間帯における長期変動値Ｓｈ_kを算出する。

すなわち、長期変動値Ｓｈ_kは、同一時間帯ｋにおける時間帯別平均値Mｄ_i,kの分散である。

Subsequently, the time zone determination unit 400 calculates a long-term fluctuation value Sh _{k in the kth} time zone using the following equation.

That is, the long-term fluctuation value Sh _k is a variance of the time zone average value Md _{i, k in} the same time zone k.

FIG. 7 shows the relationship between the magnitude of the short-term fluctuation value Sm _k and the long-term fluctuation value Sh _k and the state of the resident 80 and the like.

As shown in FIG. 7, a time zone in which both the short-term fluctuation value Sm _k and the long-term fluctuation value Sh _k are small is a time zone in which the operation of the electric device 30 is steadily small. In such a time zone, the resident 80 is often either sleeping or going out. Therefore, it is not appropriate to determine the state of the occupant 80 based on the measurement value of the power consumption in such a time zone.

On the other hand, the time zone in which both the short-term fluctuation value Sm _k and the long-term fluctuation value Sh _k are large is a time zone in which the electric device 30 is frequently used on a daily basis, but the usage time of the electric device 30 varies depending on the day. Such a time zone is, for example, a time zone for relaxing at breakfast or before going to bed. For example, during breakfast, the type of cooker used, such as a microwave oven or a toaster, varies depending on the meal content, but since the cooker is used during the same time period, short-term fluctuations in power consumption are observed.

On the other hand, in the time zone in which the short-term fluctuation value Sm _k is large and the long-term fluctuation value Sh _k is small, the difference in fluctuations in power consumption over a plurality of days is small even though the electric device 30 is in operation. For this reason, during this time period, automatic operation devices that operate on time, such as electric water heaters and electric vehicle charging, are operating regularly, that is, automatic operation devices (electric water heaters, electric vehicle charging) on time There is a high possibility that it is a time zone in which driving is performed.

Furthermore, the time zone in which the short-term fluctuation value Sm _k is small and the long-term fluctuation value Sh _k is large is a time zone in which the usage status of the electrical device 30 varies from day to day. Such a time zone applies to the time of having dinner, which is easy to change depending on the time of going home, and the time to relax afterwards.

FIG. 8 shows an example of a daily transition of the short-term fluctuation value Sm _k and the long-term fluctuation value Sh _k . As shown in FIG. 8, the short-term fluctuation value Sm _k and the long-term fluctuation value Sh _k both exceed the threshold value at breakfast at 8:00 am and relaxation before bedtime at 22:00 to 24:00. If the fluctuation of the power consumption during this time period is used, since the resident 80 frequently operates the electric device 30 on a daily basis, when the resident 80 does not operate the electric device 30 during this time period, the resident 80 Can be estimated to be in an unusual state.

Returning to FIG. 4, subsequently, the time zone determination unit 400 searches for a time zone k in which the short-term fluctuation value Sm _k and the long-term fluctuation value Sh _k exceed a predetermined threshold Th1 (for example, 100 W) (step S305). In this case, the top n of the corresponding time zones k may be stored as safety confirmation time zones. In this embodiment, the short-term fluctuation value Sm _k and the long-term fluctuation value Sh _k are shared, but the short-term fluctuation value Sm _k is compared with the first threshold value, and the long-term fluctuation value Sh _k is the first threshold value. You may make it compare with a different 2nd threshold value.

As described above in detail, according to this embodiment, the short-term fluctuation value Sm _k in each time zone k of the power consumption of the electrical device 30 in the house 70 and the long-term fluctuation in the same time zone k in a predetermined period. Both the value Sh _k are calculated. The short-term fluctuation value Sm _k is a value indicating whether or not the in-home equipment is operating in the time zone, and the long-term fluctuation value Sh _k is a steady operation state of the in-home equipment in the time zone. It is a value indicating whether or not. For this reason, if the short-term fluctuation value Sm _k and the long-term fluctuation value Sh _k are used, whether the change in the information related to the operating state of the home equipment in the time zone is due to the automatic driving device operated by a timer or the like It is possible to distinguish whether it is due to the operation of the electric device 30. As a result, the state of the resident 80 can be determined more accurately.

That is, according to this embodiment, the time zone determination unit 400 calculates the short-term fluctuation value Sm _{k of} power consumption in each time zone _k and the long-term fluctuation value Sh _k within the same time zone over a predetermined period. Then, a time zone in which each fluctuation value exceeds a predetermined threshold Th1 is determined as a safety confirmation time zone. Thereby, based on the fluctuation | variation of power consumption, the time slot | zone when the resident | operator 80 carries out daily living action can be pinpointed. Then, paying attention to the time zone, the safety of the resident 80 can be confirmed.

  Note that the time zone determination unit 400 may determine a time zone in which the state of the resident 80 is determined based on a temporal change in power consumption, for example, the sum of the difference values before and after. As described above, even if the difference value (time change) of the power consumption is used, the fluctuation of the power consumption can be obtained numerically. As a result, the operation status of the electric device 30 by the resident 80 can be more accurately determined.

  Moreover, you may make it the time slot | zone determination part 400 switch the time slot | zone (refer FIG. 8) which confirms the safety of the resident 80 with a weekday and a holiday. When the resident 80 is a single person who works, the lifestyle pattern differs greatly between weekdays and holidays. For this reason, since the time slot | zone which confirms safety can be determined according to the rhythm of the resident 80, the safety | security of the resident 80 can be confirmed more correctly.

  In this case, the time zone determination unit 400 determines different time zones for holidays and weekdays. In the case of a holiday, the safety confirmation unit 500 determines the state of the resident 80 based on the measured value of the power consumption of the electrical device 30 in the time zone corresponding to the holiday. The state of the resident 80 is determined based on the measured value of the power consumption of the electric device 30 in the time zone.

  Further, the time zone determination unit 400 uses the power consumption stored in the recording unit 200 to update the time zone (see FIG. 8) for confirming the safety of the resident 80 every time a predetermined period elapses. May be. By updating the safety confirmation time zone for each predetermined period, it is possible to match the power usage situation of the occupant 80 that changes according to the season.

  In addition, the time zone determination unit 400 sets a weighting factor for each time zone, and performs safety confirmation using the short-term fluctuation value and the long-term fluctuation value reflecting the weighting coefficient for the power consumption of the day as evaluation values. Also good. By setting the weighting factor, the safety of the resident 80 can be confirmed without giving a more important time zone (see FIG. 8).

In this case, the calculation unit 300 multiplies the short-term fluctuation value Sm _k and the long-term fluctuation value Sh _k by a weighting factor determined for each time period. Then, the time zone determination unit 400 determines a time zone for determining the state of the resident 80 in the house 70 based on the short-term fluctuation value Sm _k and the long-term fluctuation value Sh _k multiplied by the weighting factor.

Embodiment 2. FIG.
Next, a second embodiment of the present invention will be described. In the drawings referred to in the following description, the same reference numerals are given to the same components as those in the first embodiment.

  In this embodiment, the configuration of the safety confirmation system 1 is the same as that of the above embodiment. In this embodiment, only the operation of the safety confirmation unit 500 is different from that of the first embodiment.

FIG. 9 shows an example of the operation of the safety confirmation unit 500. As shown in FIG. 9, first, the safety confirmation unit 500 acquires the power consumption Y _j in the determined time zone from the recording unit 200 (step S401). Here, the power consumption at time j is represented by Y _j .

Subsequently, the safety confirmation unit 500 divides the acquired power consumption Y _j by a predetermined window width M (for example, 1 hour), and calculates a fluctuation index value Ym _k of the power consumption in each time period (step) S402). More specifically, the safety confirmation unit 500 calculates the average value of the power consumption Y _{j in} each time zone using the following equation.

続いて、安否確認部５００は、次式を用いて、ｋ番目の時間帯における変動指標値Ｙｍ_kを算出する。

Subsequently, the safety confirmation unit 500 calculates a variation index value Ym _k in the k-th time zone using the following equation.

The safety confirmation unit 500 determines whether or not the fluctuation index value Ym _k is below a predetermined threshold Th3 in any time zone of the safety confirmation determined by the time zone determination unit 400 (step S403). In any time zone, when the fluctuation index value Ym _k is lower than the predetermined threshold Th3 (step S403; Yes), the safety confirmation unit 500 transmits an abnormality signal that an abnormality has occurred in the resident 80. The data is output to the unit 600 (step S404). Either in the time zone, fluctuation index value Ym _k is, when it becomes a threshold Th3 or more (step S403; No), safety confirmation unit 500 ends the processing directly. In this embodiment, the threshold value Th3 corresponds to the third threshold value.

As described above in detail, according to this embodiment, the fluctuation value (dispersion) of the power consumption Y _j in a specific time zone is calculated, and the occupant 80 depends on whether or not the fluctuation value falls below the threshold Th3. The operation of the electric device 30 is detected. By doing in this way, operation of the electric equipment 30 by the resident 80 can be detected easily. As a result, the state of the resident 80 can be determined more accurately.

Incidentally, safety confirmation unit 500, the time change of the power Y _j of the day (e.g., the sum of the front and rear differential value), may be calculated as the fluctuation value of the power consumption Y _j. By using the time change of the power consumption Y _j as an index, it is possible to confirm the safety of the resident 80 by paying attention to the fluctuation of the power consumption Y _j . Even in this case, the operation of the electric device 30 by the resident 80 can be accurately detected.

  In the above embodiment, power consumption is measured and used as information on power consumption. However, power consumption may be measured and the power consumption may be used as information on power consumption.

  Further, the measurement unit 100 may measure the amount of water used by the resident 80 using a flow rate sensor or the like instead of the power sensor 20. Tap water is always used within a day, such as a toilet, bath or cooking. For this reason, the safety of the resident 80 can be confirmed by detecting the use situation of water supply. As described above, the state of the resident 80 is determined based on information about the operating state in the house, such as the amount of water used by the water supply facility and the amount of gas used by the gas facility, as well as the power consumption of the electrical device 30. It may be.

  In the above embodiment, the control program to be executed is computer-readable such as a flexible disk, a CD-ROM (Compact Disc Read-Only Memory), a DVD (Digital Versatile Disc), and an MO (Magneto-Optical Disc). A system that executes the above-described control program may be configured by storing and distributing the program in a recording medium and installing the program.

  Further, the program may be stored in a disk device or the like of a predetermined server device on a communication network such as the Internet, and may be downloaded, for example, superimposed on a carrier wave.

  In addition, when the above functions are realized by sharing an OS (Operating System), or when the functions are realized by cooperation between the OS and an application, only the part other than the OS may be stored in a medium and distributed. You may also download it.

  Various embodiments and modifications can be made to the present invention without departing from the broad spirit and scope of the present invention. The above-described embodiments are for explaining the present invention and do not limit the scope of the present invention. In other words, the scope of the present invention is shown not by the embodiments but by the claims. Various modifications within the scope of the claims and within the scope of the equivalent invention are considered to be within the scope of the present invention.

  The present invention can be suitably employed for, for example, a monitoring service for elderly people living alone.

1 Safety confirmation system 10 Safety confirmation device 11 CPU
12 ROM
13 RAM
14 Hard disk 15 Signal interface (I / F)
16 Clock circuit section 17 Display section 18 Operation section 19 Network interface (I / F)
DESCRIPTION OF SYMBOLS 20 Electric power sensor 26 Indoor wiring 30 Electric equipment 40 Communication network 50 Server 60 Monitoring center 70 Housing 80 Resident 100 Resident 100 Measurement part 200 Recording part 300 Calculation part 400 Time zone determination part 500 Safety confirmation part 600 Transmission part

Claims (10)

A measurement unit that measures the power consumption of the in- house equipment at predetermined time intervals;
A recording unit that records information on power consumption measured by the measurement unit together with a time when the information was acquired;
Based on the information recorded in the recording unit, a short-term fluctuation value is calculated as a variance of power consumption in each time period obtained by dividing a predetermined period by a predetermined window width, and the time in each time period during the predetermined period A calculation unit that calculates a long-term fluctuation value as a variance of the average power consumption by band ,
Based on the short-term variation value and the long-term variation value calculated by the calculation unit, a time zone determination unit that determines a time zone for determining the state of a resident in the house,
A determination unit that determines the state of the resident based on the power consumption of the household equipment in the time period determined by the time period determination unit;
A state determination device comprising: The time zone determination unit
Determining a time zone in which the short-term fluctuation value exceeds a first threshold value and the long-term fluctuation value exceeds a second threshold value as a time zone for confirming the safety of the resident;
The state determination apparatus according to claim 1. The determination unit
In all the time zones determined by the time zone determination unit, when the fluctuation value of the power consumption of the home equipment does not exceed the third threshold value, it is determined that an abnormality has occurred in the resident.
The state determination apparatus according to claim 1 or 2 . The determination unit
Wherein based on the dispersion amount of power consumption of in-house equipment at each time slot, calculating the variation value,
The state determination apparatus according to claim 3 . The time zone determination unit
Decide different time zones for holidays and weekdays,
The determination unit
In the case of a holiday, the state of the resident is determined based on the power consumption of the in-house equipment in the time zone corresponding to the holiday,
In the case of a weekday, based on the power consumption of the in-house equipment in the time zone corresponding to the weekday, the state of the resident is determined.
The state determination apparatus as described in any one of Claim 1 to 4 . The time zone determination unit
Each time a predetermined period elapses, the time zone for determining the resident state is updated.
The state determination apparatus according to any one of claims 1 to 5 . The calculation unit includes:
Multiplying the short-term fluctuation value and the long-term fluctuation value by a weighting factor determined for each time zone,
The time zone determination unit
Based on the short-term variation value and the long-term variation value multiplied by a weighting factor, a time zone for determining the state of a resident in the house is determined.
The state determination apparatus according to any one of claims 1 to 6 . The state determination device according to any one of claims 1 to 7 ,
A notification device for informing the state of the resident determined by the state determination device;
A state determination system comprising: A measurement process for measuring power consumption of in- house equipment at predetermined time intervals;
A recording step of recording information on power consumption measured in the measurement step together with a time when the information was acquired;
Based on the information recorded in the recording step, a short-term variation value is calculated as a variance of power consumption in each time period divided by a predetermined window width during a predetermined period, and the time in each time period during the predetermined period A calculation process for calculating a long-term fluctuation value as a variance of the average power consumption by band ,
Based on the short-term fluctuation value and the long-term fluctuation value calculated in the calculation step, a time zone determination step for determining a time zone for determining the state of a resident in the house,
A determination step of determining the state of the resident based on the power consumption of the in-home equipment in the time zone determined in the time zone determination step;
State determination method including Computer
A measurement unit that measures the power consumption of the in- house equipment at predetermined time intervals,
A recording unit that records information on power consumption measured by the measuring unit together with a time when the information was acquired;
Based on the information recorded in the recording unit, a short-term fluctuation value is calculated as a variance of power consumption in each time period obtained by dividing a predetermined period by a predetermined window width, and the time in each time period during the predetermined period A calculation unit that calculates long-term fluctuation values as the variance of average power consumption by band ,
Based on the short-term variation value and the long-term variation value calculated by the calculation unit, a time zone determination unit that determines a time zone for determining the state of a resident in the house,
A determination unit that determines the state of the resident based on the power consumption of the home equipment in the time period determined by the time period determination unit,
Program to function as.

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